Study of the physical properties of type IV gypsum, resin-containing, and epoxy die materials

Duke, P. J.; Moore, B. Keith; Haug, Steven P.; Andres, Carl J.

doi:10.1016/s0022-3913(00)70043-6

Cited by 64 publications

(66 citation statements)

References 16 publications

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“…At least 90% of line is needed to be replicated to count as present. 7 The results of present study has shown surface details of epoxy resin is superior which can reproduce 1 μm narrow line, next best being resin-modified gypsum (15 μm) and finally is conventional type IV gypsum material (20 μm) (Graph 4).…”

Section: Surface Detail Reproductionmentioning

confidence: 56%

“…1, 2, 5, 10, 15, 20, 30, 40 and 50 μm are scribed on free surface of rectangle. 7 This was used for testing surface detail reproduction and transverse strength. For determining surface detail reproduction, 90% of each engraved line needed to be replicated to count it as present.…”

Section: Duke's Diementioning

confidence: 99%

“…The narrowest line seen on all specimens of each die material needed to be recorded if there is any variation. 7 To evaluate and comparative transverse strength of conventional type IV gypsum, resin-modified gypsum, epoxy resin of 10 Duke's test specimens of each material with assigned nomenclature tested with Instron universal vibrated on Unident vibrator, painted on the entire impression surface with a brush and then the mixture poured into the impression. Resin-modified gypsum was allowed during the test.…”

Section: Fabrication Of Specimensmentioning

confidence: 99%

“…Resinous die materials are more abrasion resistant and are stronger than gypsum material. 7,8 The high strength of resinous die material renders them extremely useful in the replication of long and thin preparations. The surface detail of epoxy resin is far superior to that of gypsum material.…”

Section: Introductionmentioning

confidence: 99%

“…7 According to ADA specification number 25, for dental gypsum products minimum width line to be replicated to be used as die material is 50 micrometer. 1 For transverse strength, test specimens are subjected to three point loading on Instron Universal testing machine (Sintech 1123, Renew, Minneapolis, Minn).…”

mentioning

confidence: 99%

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Comparative Evaluation of Few Physical Properties of Epoxy Resin, Resin-Modified Gypsum and Conventional Type IV Gypsum Die Materials: An in vitro Study

Gujjarlapudi

Reddy²,

Madineni³

et al. 2012

The Journal of Contemporary Dental Practice

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Aim:To compare and evaluate few physical properties of epoxy resin, resin-modified gypsum and conventional type-IV gypsum die material. Materials and methods:In the present study, dimensional accuracy, surface detail reproduction and transverse strength of three die materials like epoxy resin (Diemet-E), resin-modified gypsum (Synarock) and conventional type-IV gypsum (Ultrarock) are analyzed. For dimensional accuracy, master die (Bailey's die) is used and calibrations were made with digital microscope. For surface detail reproduction and transverse strength, rectangular stainless steel master die (Duke's die) was used and calibrations were made with Toolmaker's microscope and Instron universal testing machine respectively. One-way analysis of variance (ANOVA) was performed on the means and standard deviation for groups of each test. Results:The results of the study showed statistically significant difference among these materials in dimensional accuracy, surface detail reproduction and transverse strength. Conclusion:Epoxy resin exhibited superiority in dimensional accuracy, surface detail reproduction and transverse strength and is nearest to the standards of accurate die material.

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Section: Surface Detail Reproductionmentioning

confidence: 56%

Section: Duke's Diementioning

confidence: 99%

Section: Fabrication Of Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Comparative Evaluation of Few Physical Properties of Epoxy Resin, Resin-Modified Gypsum and Conventional Type IV Gypsum Die Materials: An in vitro Study

Gujjarlapudi

Reddy²,

Madineni³

et al. 2012

The Journal of Contemporary Dental Practice

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The influence of the cavity preparation design on marginal accuracy of laboratory-processed resin composite restorations

et al. 2007

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The aim of this study was to evaluate the influence of different cavity preparation designs on marginal accuracy of laboratory-processed resin composite restored teeth. Eighty mandibular human third molars were selected. There were two experimental factors, occlusal isthmus width (narrow vs wide) and cuspal coverage (inlay, one-cusp onlay, two-cusp onlay, and all-cusp onlay), resulting on eight groups (N = 10). Indirect composite restorations (SR Adoro, Ivoclar-Vivadent) were manufactured and positioned over each respective preparation. Marginal accuracy evaluation was accomplished using a stereomicroscope at three points on buccal, lingual, mesial, and distal regions with 40x magnification. The results showed significant differences (P = 0.00) with wide inlay showing the best overall marginal accuracy and narrow inlay the worst one. Two-way analysis of variance (ANOVA) showed significant differences when considering the factor occlusal isthmus width (P = 0.00). In general, preparations with wide occlusal isthmus presented better results than narrow ones, except for wide all-cusp onlays; however, the test failed to show differences when considering the cuspal coverage (P = 0.42) or the interaction between both factors (P = 0.30). The effect of occlusal width extension on marginal accuracy of indirect composite resin restorations is significant, with lower values of gaps width in wide preparations, but since in a clinical situation this would mean greater removal of sound tooth structure, less-aggressive preparations combined with other restorative procedures seem to be more feasible.

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Gypsum-bonded particleboard manufactured from agricultural based material

Nazerian

Kamyab

2013

For. Sci. Pract.

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Study of the physical properties of type IV gypsum, resin-containing, and epoxy die materials

Cited by 64 publications

References 16 publications

Comparative Evaluation of Few Physical Properties of Epoxy Resin, Resin-Modified Gypsum and Conventional Type IV Gypsum Die Materials: An in vitro Study

Comparative Evaluation of Few Physical Properties of Epoxy Resin, Resin-Modified Gypsum and Conventional Type IV Gypsum Die Materials: An in vitro Study

The influence of the cavity preparation design on marginal accuracy of laboratory-processed resin composite restorations

Gypsum-bonded particleboard manufactured from agricultural based material

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